Home / 209,020.64-288,493.80-128,517.20

Finding the Fourth Proportional to 209,020.64, 288,493.80 and 128,517.20

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Solution

The fourth proportional to 209,020.64, 288,493.80 and 128,517.20 is: 177,381.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,020.64 : 288,493.80 = 128,517.20 : x
  2. Step 2: Convert to fraction form
    209,020.64/288,493.80 = 128,517.20/x
  3. Step 3: Cross multiply
    209,020.64x = 288,493.80 × 128,517.20
  4. Step 4: Simplify right side
    209,020.64x = 37,076,415,393.36
  5. Step 5: Solve for x
    x = 37,076,415,393.36/209,020.64
  6. Step 6: Final answer
    x = 177,381.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.